Made of stainless steel with copper plated inner, double wall construction for insulation of hot or cold liquids, snap-on, spill-resistant thumb-slide lid with removable slider for easy cleaning, vacuum insulated, keeps drinks cold up to 24 hours and hot up to 3 hours, non-slip bottom, condensation free, removable silicone base, Swig Life is a certified swam owned business, meets FDA requirements, removable silicone base, BPA free, dishwasher safe.